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2 layers34.8 × 14.8 mmMicroBot, the printed circuit board in 3D

My first fully custom project inspired by the microbots from the movie Big Hero 6. My goal is to get into swarm robotics and I believe this is a HUGE leap in that direction, but a good moment to learn.

Size
34.8 × 14.8 mm
Copper layers
2
Thickness
1.6 mm
Parts
68
Nets
76
Pads
281
Tracks, vias
381, 24
Pours
1
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
29 Dec 2025
Updated
31 Mar 2026

Overview

MicroBot is an open-source printed circuit board by Rishabh416, from the Rishabh416/microbot repository on GitHub. It is a 2-layer board of 34.8 × 14.8 mm with 68 parts on 76 nets, routed with 381 tracks and 24 vias.

It is built around the NRF24L01P-R, DRV8837CDSG and LSM6DS3, with the XC6220B331MR, 1N5819WS and 2450AT18A0100001E among its other parts. Its parts include 22 capacitors, 14 resistors, 8 ICs, 7 connectors and 4 diodes. It belongs with the STM32 boards of this library.

Main components

7

README

README.md

Microbot

My first fully custom project inspired by the microbots from the movie Big Hero 6. My goal is to get into swarm robotics and I believe this is a HUGE leap in that direction, but a good moment to learn. I made this project to learn about swarm robotics and the potential application in environmental applications such as in deserts.

PCB.png 3DCase.png 3DCase2.png

Part NumberJLC Part NumberDescriptionManufacturerPackageURL
STM32F103C8T6C8734STM32 MCUSTMicroelectronicsLQFP-48(7x7)Link
N/AN/AElectromagnet
N/AServo Motor
N/ADC Motor
ICM-42688-P(TOKMAS)C54308212IMUTokmasLGA-14(2.5x3)Link
NRF24L01P-RC8791NRF24Nordic SemiconQFN-20-EP(4x4)Link
KH-204065-DZC530676Pogo MaleShenzhen Kinghelm ElecSMD, D=2mmLink
BWCD-L4.5W2.0H2.3C2826546Pogo FemaleBAT WIRELESSSMD, D=2mmLink
N/ALiPo Battery
MCP73831-2ATI/MCC635036BMSMicrochip TechDFN-8-EP(2x3)Link
XC6220B331MR-GC86534Voltage RegulatorTorex SemiconSOT-25Link
DRV8837CDSGRC191000Motor DriverTexas InstrumentsWSON-8-EP(2x2)Link
2450AT18A100EC89334AntennaJohanson Dielectrics1206Link
16M 12PF 10PPMC297535916MHz CrystalSSTHC-49S-SMD-2P-MiniLink
SSM3J338R,LFC146352MOSFETTOSHIBASOT-23FLink
Capacitors0603
HVRTB-3433EPXC5246356Green LEDHONGLITRONICSMD-6P, 3.4x3.3mmLink
DiodesD_SOD-323
TJ-S0704EX4T5ALC2R-A5C48689442Red LEDTOGIALED0201Link
918-118A2021Y40002C399939USB CJing ExtensionSMDLink
B2B-PH-K-S-GWC5251182Conn_01x02JST插件, P=2mmLink
2.54-1*3P针C49257Conn_01x03_PinBOOMELE插件, P=2.54mmLink
2.54-1*4C5116483Conn_01x04_PinZHOURI插件, P=2.54mmLink
Inductors0603
Resistors0603

Parts

68
QtyValueFootprintReferences
8100nCapacitor_SMD:C_0603_1608MetricC1, C2, C3, C4, C5, C6, C7, C8
610kResistor_SMD:R_0603_1608MetricR1, R2, R5, R6, R10, R11
4Conn_01x03_PinConnector:FanPinHeader_1x03_P2.54mm_VerticalJ3, J4, J5, J6
3DRV8837CPackage_SON:WSON-8-1EP_2x2mm_P0.5mm_EP0.9x1.6mmU4, U5, U6
3Motor_DCTestPoint:TestPoint_2Pads_Pitch2.54mm_Drill0.8mmM1, M2, M3
210uCapacitor_SMD:C_0603_1608MetricC18, C21
21MResistor_SMD:R_0603_1608MetricR4, R9
21N5819WSDiode_SMD:D_SOD-323D2, D3
21nCapacitor_SMD:C_0603_1608MetricC10, C19
222pCapacitor_SMD:C_0603_1608MetricC12, C13
25.1kResistor_SMD:R_0603_1608MetricR7, R8
2FemalePogoConnector_PinSocket_2.00mm:PinSocket_1x01_P2.00mm_VerticalTP2, TP4
2MalePogoConnector_PinHeader_2.00mm:PinHeader_1x01_P2.00mm_VerticalTP1, TP3
11.5pCapacitor_SMD:C_0603_1608MetricC14
1100kResistor_SMD:R_0603_1608MetricR13
110nCapacitor_SMD:C_0603_1608MetricC9
1150Resistor_SMD:R_0603_1608MetricR14
116MHzCrystal:Crystal_SMD_Abracon_ABM7-2Pin_6.0x3.5mmX1
11pCapacitor_SMD:C_0603_1608MetricC15
11uCapacitor_SMD:C_0603_1608MetricC22
12.2nCapacitor_SMD:C_0603_1608MetricC16
12.7nInductor_SMD:L_0603_1608MetricL1
122kResistor_SMD:R_0603_1608MetricR3
12450AT18A0100001E2450AT18A0100001E:XCVR_2450AT18A0100001EE1
13.9nInductor_SMD:L_0603_1608MetricL2
133nCapacitor_SMD:C_0603_1608MetricC11
14.7pCapacitor_SMD:C_0603_1608MetricC17
14.7uCapacitor_SMD:C_0603_1608MetricC20
175kResistor_SMD:R_0603_1608MetricR12
18.2nInductor_SMD:L_0603_1608MetricL3
1Conn_01x02Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_VerticalJ2
1Conn_01x04_PinConnector_PinHeader_1.00mm:PinHeader_1x04_P1.00mm_VerticalJ7
1GreenLED_SMD:LED_0201_0603MetricD1
1LSM6DS3Package_LGA:LGA-14_3x2.5mm_P0.5mm_LayoutBorder3x4yU2
1MCP73831-2-MCPackage_DFN_QFN:DFN-8-1EP_3x2mm_P0.5mm_EP1.7x1.4mmU7
1RedLED_SMD:LED_0201_0603MetricD4
1STM32F103C8TxPackage_QFP:LQFP-48_7x7mm_P0.5mmU1
1Si2371EDSPackage_TO_SOT_SMD:SOT-23Q1
1USB_C_Receptacle_PowerOnly_6PConnector_USB:USB_C_Plug_ShenzhenJingTuoJin_918-118A2021Y40002_VerticalJ1
1XC6220B331MRPackage_TO_SOT_SMD:SOT-23-5U8
1nRF24L01PPackage_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mmU3

Questions

How big is the MicroBot PCB?

It measures 34.8 × 14.8 mm and has 2 copper layers, 1.6 mm thick.

What parts does the MicroBot use?

68 parts, built around the NRF24L01P-R, DRV8837CDSG, LSM6DS3 and XC6220B331MR. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the MicroBot KiCad files?

From the Rishabh416/microbot repository on GitHub, at the commit this page was made from: the board is microbot PCB V2/MicroBot.kicad_pcb and its schematic microbot PCB V2/MicroBot.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the MicroBot design in my own project?

Its repository states no licence, so its author keeps all rights: ask Rishabh416 before reusing the design.

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